CLI Reference Guide-R04

Chapter 25 | Multicast Filtering Commands
IGMP Filtering and Throttling
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Syntax
ip igmp max-groups action {deny | replace}
no ip igmp max-groups action
deny - The new multicast group join report is dropped.
replace - The new multicast group replaces an existing group.
Default Setting
Deny
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
When the maximum number of groups is reached on a port, the switch can take
one of two actions; either “deny” or “replace.” If the action is set to deny, any new
IGMP join reports will be dropped. If the action is set to replace, the switch
randomly removes an existing group and replaces it with the new multicast group.
Example
Console(config)#interface ethernet 1/1
Console(config-if)#ip igmp max-groups action replace
Console(config-if)#
ip igmp query-drop This command drops any received IGMP query packets. Use the no form to restore
the default setting.
Syntax
[no] ip igmp query-drop [vlan vlan-id]
vlan-id - VLAN ID (Range: 1-4094)
Default Setting
Disabled
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
This command can be used to drop any query packets received on the specified
interface. If this switch is acting as a Querier, this prevents it from being affected by
messages received from another Querier.